OptionMeaning
ENABLE, DISABLEgenerate this artefact for the messages below, or not
PREFIX word, POSTFIX wordthe word put before / after the message name
NOPREFIX, NOPOSTFIXno word before / after
LOCALE EXTRA ENABLE, LOCALE EXTRA DISABLEalso generate the overload with a trailing std::locale const &

word is a name.

The first PREFIX / POSTFIX / NOPREFIX / NOPOSTFIX of an artefact replaces both its defaults, so $STRING PREFIX get turns HelloStr into getHello, not getHelloStr. See Reference › Naming & switching.